Pump



Sept. 15; 1925. 1,553,460

L. D. MOWREY ET AL PUMP Filed March 21. 1925 INVENTORS I ATTORNEY Patented Sept. 15, i

=-UNITEDV STATES PATENT OFFICE.

Lns'ma n. MOWRE! AND GEORGE r. xrmBELL, or Bunxntmnnrr, 'rnxas.

rung.

Application med March 21, 1925. Serial m. 17,170.

To all whom it may concern.

Be it known that we, LESTER D. MOWREY and GEORGE T. KIMBELL, citizens of the United States, residing at-Burkburnett, .in the county of Wichita and State of Texas,

have invented certain new and useful Im.

provements in Pumps, of which the following is a specification. w

This invention relates to pumps, particularly' for oil wells, and has for its objects the provision of a pump so designed as to prevent sand from accumulating on the plunger rod of the pump, to aid in the fluid lifting operation and to eliminate the probable sticking of the pump plunger.

Another and important object of the invention is to provide a packing box for the plunger rod to prevent leakage, and to provide a compact and strongly built pump.

lVith the aboveand other objects in view the invention will be more clearly understood by reference to the following description, taken in connection with the accompanying drawings, forming part hereof, and in which:

Figure 1 is a vertical sectional view of a pump embodying the invention.

Figures 2, 3, 4.- and 5 are cross-sectional views thereof, taken on the same lines indicated by the respective figures.

Continuing the description of the invention and referring to its various parts more in detail, 1 denotes the plunger barrel of the pump which is provided with an upper valve 2. The lower part of the pump 3, seated in the bottom of the well, has a caged, stationary valve 4, the liquid entering the barrel through the inlets 5, and passing through the perforations -3 in the lower end 2 of the plunger. barrel. The object of these perforations will be referred to hereinafter.

Secured to the lower part of the pump 3 is a packing chamber 6 with a central opening through which the plunger barrel 1 works.

The upper part or connecting headof the chamber 6 is recessed at 7 and provided with spaced apertures 88 for the entrance of liquid which during the operation ofthe pump compresses the packing in a stuffing box 9. This stuffing box is filled with a number of round, solid rings 1010 in the center of each of which is embedded a heavy wire 11 to prevent the ring from collapsing. Seated upon the top-most ring is a follower ring 12disposed directly underneath the apertures 8-.8'. Below the rings 1s a connector 12 for unitingthe two upper parts of the packing chamber together, and whlch forms a support for the rin s 10--10. In the middle'section ofthe c amber 6 1s a tapered, cylindrical member or pump the middle section with the. lower section of th1s chamber. The space 14 between the inner walls of the chamber. and the tapered,

cylindrical member 13 rovides a sand trap or pocket on the outside, the member 13 wiping any sand from the plunger barrel or tube and catchin it in the pocket during the reciprocation o? the plunger. Below the member 13 is a spring 15, a follower head 16 and several rin s 101Q as in the upper part of the cham er. The lower-most ring is seated upon a lower head 17 which connects the pump part3.

Referring again tothe perforations 3" in the lower end of the plunger barrel 1; the ob ect of these perforations is to equalize the fluid pressure on thetop, bottom' and wearlng surfaces of the packing to preventthe packing from collapsing when itis necessary to remove the plunger.

In the operation of the pump, on the upward stroke, the oil or liquid pressure will enter the apertures 8'8 through the recess 7 and compress the packing rings 10, making a snug and tight fit around the plunger. The spring 15, hearing against the rings 10 also causes the. barrel or plunger to be tight--. ly embraced at this point, thus preventi any leakage. The arrangement also pr vides for the wiping of the plunger free from sand at eachstroke and traps it in the pocket 14.

What is claimed is: e

1. In a pump, the combination of a tubular plunger rod, a valve therein, a packing.

barrel portion 13, the bottom of which unites rings to provide a tight embrace of the packing chamber around the rod to prevent leakage.

2. In a pump construction, the combination of a plunger rod, with a valve, a packing chamber, an upper connecting head onthe chamber with a recess and apertures rings. H p, v a

3'. Inapump'constructlon, the comb1na= tion'of a 'tubular' plun'gerrod with a lower for entrance of liquid under pressure, a plurality 50;: ;re-inorced rings gnext theigfoh lower head, a support for the rings, an 'up-' directed tapered, cylindnca'lQmemwardl H ber be owthe supportprovidmg an annular recess between the chamber walls and said tapered, cylindrical member for a sand tra-p,

re-inforced packing rings belovv the tapered, cylindrical member under spring tension,

and a lower connecting head bc lovvthelatter perforated jendQa valve the plunger r'od, a packing chamber through which the rod reciprocat'es; said chamber. ;having 1 a recessed an'dfapertured head, packing rings .l for causinga close embrace of the rod on liquid pressure in the pump operation similar rings on the lower end of'the chamber,

and a sand trap inthecenter of said chamber, said trap comprising a recess formed between the inner sides ofthe chamber and an upwardly tapered v 'memberf secured to the chamber sides at its base.

4. Ina pump construction, the combination of a'tubu'larphingerrod, Withavalve,

a packing chamber, an upper connecting 'head on the chamber with a recess and aperture ior entrance oi liquid under pressure, a plurality of re-inforccd rings next the follower head, a support for the ring, an up ardly ,directed "cylindrical pump barrel member outsidefof said plunger with a taper providing an annular recess between the chamber and member for a sand t-rap', rev inforced'packing rings below the cylindrical .memberfunder spring'tensi'on and a lower 

